Homework Assignment - Chapter 2 Instructions help Question 12 of 12 Save & Ext Submit 12. 200 points Problem 2-21 A retail store had sales of $44.850 in April and $55.150 in May. The store employightfull-time workers who work a 40-hour week in April the store also had eight part-time workers at 14 hours per week, and in May the store had ten part-timers at 20 hours per week (assume four weeks in each month). Using sales dollars as the measure of output, what is the percentage change in productivity (dollars output per labor hour) from April to May (Round your intermediate calculations and final answer to 2 decimal places.) Change in productivity References eBook & Resources Worksheet Problem 2-21